add --footer-file flag

like --foter but read it from a file

README.md

@@ -153,9 +153,7 @@ behind a proxy with the flags `--address` and `--port`.
 You really want to secure that endpoint, you can generate some letsencrypt
 certificate and use the `--tls-cert` and `--tls-key` flags to specify them.
 
-If you're really lazy (and who isn't) you can just give the flag `--auto-cert` and
-it will automatically generate certs. Unfortunately this require to run on
-port 443 which need root and very secure. It may be better to just have [caddy](#caddy) installed in front of gosmee.
+There is a lot of other flags you can use to customize the server, you can see them with `gosmee server --help`.
 
 To use it you go to your URL and a suffix with your random ID. For example:
 

gosmee/flags.go

@@ -99,6 +99,10 @@ var serverFlags = []cli.Flag{
 		Name:  "footer",
 		Usage: "An HTML string to show in footer for copyright and author",
 	},
+	&cli.StringFlag{
+		Name:  "footer-file",
+		Usage: "An HTML file to show in footer for copyright and author",
+	},
 	&cli.StringFlag{
 		Name:    "address",
 		Aliases: []string{"a"},

gosmee/server.go

@@ -35,6 +35,17 @@ func errorIt(w http.ResponseWriter, _ *http.Request, status int, err error) {
 func serve(c *cli.Context) error {
 	publicURL := c.String("public-url")
 	footer := c.String("footer")
+	footerFile := c.String("footer-file")
+	if footer != "" && footerFile != "" {
+		return fmt.Errorf("cannot use both --footer and --footer-file")
+	}
+	if footerFile != "" {
+		b, err := os.ReadFile(footerFile)
+		if err != nil {
+			return err
+		}
+		footer = string(b)
+	}
 	router := chi.NewRouter()
 	router.Use(middleware.RequestID)
 	router.Use(middleware.RealIP)